Vacuum heat insulator
First Claim
1. A vacuum heat insulator comprising a receptacle defined by thin metal plates each having a flat portion providing opposing walls of the receptacle and a stack of glass fibers contained in said receptacle, the majority of the fibers of said stack being arranged at random in a direction parallel to said walls and perpendicular to a heat transfer direction and said receptacle being adapted to be sealed to place the interior thereof in a vacuum condition;
- some of the glass fibers of said glass fiber stack having been penetrated thereinto as penetration glass fibers that extend in said heat transfer direction while said glass fiber stack is maintained in a compressed condition to provide a glass fiber stack of high density held together by said penetration glass fibers whereby, upon application of the vacuum condition to said receptacle, the opposing walls are deformed inwardly and are supported by said glass fiber stack.
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Accused Products
Abstract
A vacuum heat insulator comprises compressed glass fibers, a planar thin metal plate and a drawn metal plate. A receptacle is air-tightly formed of the planar thin plate and the drawn metal plate. The glass fibers are encased in the receptacle under a vacuum condition. A small amount of the glass fibers is penetrated thereinto in a direction perpendicular to the heat transfer direction of the insulator by inserting needles having hook portions into the glass fibers whereby the compressed glass fibers are kept under a vacuum condition at a high density without any remarkable deformation.
65 Citations
7 Claims
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1. A vacuum heat insulator comprising a receptacle defined by thin metal plates each having a flat portion providing opposing walls of the receptacle and a stack of glass fibers contained in said receptacle, the majority of the fibers of said stack being arranged at random in a direction parallel to said walls and perpendicular to a heat transfer direction and said receptacle being adapted to be sealed to place the interior thereof in a vacuum condition;
- some of the glass fibers of said glass fiber stack having been penetrated thereinto as penetration glass fibers that extend in said heat transfer direction while said glass fiber stack is maintained in a compressed condition to provide a glass fiber stack of high density held together by said penetration glass fibers whereby, upon application of the vacuum condition to said receptacle, the opposing walls are deformed inwardly and are supported by said glass fiber stack.
- View Dependent Claims (2, 3, 4, 5, 6, 7)
Specification